Relic density of neutralino dark matter in the MSSM with CP violation

Journal Article · Thu Jun 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.115007· OSTI ID:20774834

Belanger, G; Boudjema, F ^[1]; Kraml, S ^[2]; Pukhov, A ^[3]; Semenov, A ^[4]

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1. LAPTH, 9 Chemin de Bellevue, B.P. 110, F-74941 Annecy-le-Vieux (France)
2. CERN, Department of Physics, Theory Division, CH-1211 Geneva 23 (Switzerland)
3. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119992 (Russian Federation)
4. Joint Institute for Nuclear Research (JINR), 141980, Dubna (Russian Federation)

We calculate the relic density of dark matter in the MSSM with CP violation. We analyze various scenarios of neutralino annihilation: the cases of a b-ino, b-ino-W-ino and b-ino-Higgsino LSP, annihilation through Higgs, as well as sfermion coannihilation scenarios. Large phase effects are found--on the one hand, due to shifts in the masses; on the other hand, due to modifications of the couplings. Taking special care to disentangle the effects in masses and couplings, we demonstrate that the presence of CP phases can have a significant influence on the neutralino relic abundance. Typical variations in {omega}h{sup 2} solely from modifications in the couplings are O (10%-100%), but can reach an order of magnitude in some cases.

• OSTI ID: 20774834
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABUNDANCE
ANNIHILATION
CP INVARIANCE
DENSITY
HIGGS BOSONS
HIGGS MODEL
NONLUMINOUS MATTER
REST MASS
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
VARIATIONS